﻿<p>The element type
<em>IfcCoveringType</em> defines commonly shared information for
occurrences of coverings. The set of shared information may
include:</p>
<ul>
<li>common properties within shared property sets</li>
<li>common material (layer set) information</li>
<li>common shape representations</li>
</ul>
<p>It is used to define an covering specification or covering
style (i.e. the specific product information, that is common to
all occurrences of that product type). Covering types may be
exchanged without being already assigned to occurrences.</p>
<p>The occurrences of the <em>IfcCoveringType</em> are represented
by instances of <em>IfcCovering</em></p>
<blockquote class="history">
HISTORY&nbsp; New entity in IFC2x2.
</blockquote>

<p class="spec-head">Informal Propositions:</p>
<ol>
<li>The material assignment, if provided using the
<em>IfcRelAssociatesMaterial</em> relationship, shall not reference
<em>IfcMaterialLayerSetUsage</em> or <em>IfcMaterialProfileSetUsage</em>.</li>
</ol>
